May weather forecast
Serra Negra do Norte, Brazil

The last month of the autumn, May, is another hot month in Serra Negra do Norte, Brazil, with temperature in the range of an average low of 22.3°C (72.1°F) and an average high of 32.5°C (90.5°F).

Temperature

With the onset of May, the average high-temperature registers at a still hot 32.5°C (90.5°F), subtly different from April's 33.1°C (91.6°F). During the month of May, an average low-temperature of 22.3°C (72.1°F) is recorded.

Heat index

The heat index for May is appraised at a blistering 42°C (107.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The months with the highest humidity are April and May, with an average relative humidity of 70%.

Rainfall

In Serra Negra do Norte, in May, during 16.9 rainfall days, 68mm (2.68") of precipitation is typically accumulated. Throughout the year, there are 122.6 rainfall days, and 442mm (17.4") of precipitation is accumulated.

Daylight

The average length of the day in May is 11h and 49min.
On the first day of the month, sunrise is at 05:30 and sunset at 17:22. On the last day of May, sunrise is at 05:34 and sunset at 17:20 -03.

Sunshine

The average sunshine in May is 8.8h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in May interprets into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.